VHF-1 downlink. Main Russian communications channel. Often active over Moskow. You can hear air to ground conversations in Russian. Sometimes English when US crews talk to their NASA representative in Star City. [Credit IZ6BYY]

166.000 AM

Soyuz-TM and Progress M-1 telemetry
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Hi, 27 JUL 2010, ~0915z.
Heard a voice on VHF-2. Unfortunately I set it on AM modulation and hardly heard what they say,
but when i switched to FM modulation,
heard Russian crew talking clearly. Seems like they are quite busy on EVA.

My confirmation is a NASA graphic outlining communications for ISS. I have also had most confirmed by reception.
"RS" is the abbreviation used by NASA to refer to Russia. "US" is used for United States.
The Russians use the EVA frequencies for communcitaion between the ISS and their suits. That communication is then relayed to the ground via various communication links. For example, RS EVA to suit - 130.167 means the frequency transmitted by ISS and received by the Orlan suit.
I have no listing for a VHF-1 for the Soyuz in my document.

Unfortunately, Russian EVA activities never seem to occur during orbits over Houston so I have not had the opportunity to listen to the suit frequencies. Since the other frequencies work, I have no reason to doubt the documentation at this time.